Lily left books with you and me (5)
I believe the answer is:
lotus
'lily' is the definition.
'left books with you and me' is the wordplay.
'left' becomes 'l' (common abbreviation).
'books' becomes 'OT' (Old Testament).
'with' is a charade indicator (letters next to each other).
'you and me' becomes 'us' (the two of us).
'l'+'ot'+'us'='LOTUS'
(Other definitions for lotus that I've seen before include "Sacred flower" , "Tropical water-lily" , "----- Eaters, indolent hedonists" , "reason for indolence" , "Mythical fruit inducing state of luxurious dreaminess" .)